Volcanoes are openings in the Earth's crust that allow molten rock, ash, and gases to escape from below the surface. When a volcano erupts, it can release lava flows, ash clouds, and toxic gases, posing a significant threat to nearby communities. Despite their destructive potential, volcanic eruptions also contribute to fertile soil over time. What comes out of a volcano during an eruption, according to the text?
A) Only ash and water
B) Molten rock, ash, and gases
C) Strong winds and rain
D) Underground rivers